Key trends for 2020 Australian Open

Feb 19, 2020

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Updated 23rd November 2021

Court Speed - What' In A Number?

The first area I wanted to look at with regards to the upcoming Australian Open is court speed, and the metrics that I generally use for this purpose are service points won percentages, and the aces per game count.

Television feeds often use a court pace index measure which take into account some intangible factors and, presumably, an unknown, weighting, but the drawbacks of such a measure include the inability to translate this to understanding how court speed is likely to impact the actual outcome of points or games.

Both service points won percentages and aces per game figures do achieve this to a greater extent, and therefore it is my preferred measure for a venue’s general court speed. The two tables below indicate the counts for the above metrics for the four Grand Slam tournaments between 2017 and 2019.

Men's Grand Slama

Service Points Won %

Aces Per Game

Australian Open

64.2

0.63

French Open

62.3

0.38

Wimbledon

65.8

0.59

US Open

62.9

0.51

Women's Grand Slams

Service Points Won %

Aces Per Game

Australian Open

57.6

0.32

French Open

55.7

0.20

Wimbledon

58

0.28

US Open

57

0.28

Here we can see that for both the men’s and women’s competitions, the Australian Open has the second highest service points won percentage across the four Grand Slam tournaments. With Wimbledon being played on grass - the quickest surface on tour - and the French Open on clay (the slowest surface on tour) it can be seen that of the two hard court Slams, the Australian Open is likely to play quicker than the US Open based on the service points won percentages. This was also borne out by the aces per game count, which had more aces per game at the Australian Open than the US Open as well.

More Tie-Breaks, Tighter Sets & Higher Totals

It also would appear that there is a slight relationship between court speed and tiebreaks per match, particularly in the men’s event, with Wimbledon and the Australian Open having a higher tie-break per match count:

Men's Grand Slams

Tie-breaks Per Match

Tie-breaks Per Set

Australian Open

0.70

0.19

French Open

0.56

0.16

Wimbledon

0.73

0.20

US Open

0.61

0.17

With the women’s event, the US Open had a higher tie-breaks per match count than the Australian Open, but this isn’t necessarily a noteworthy factor given that the US Open has a final set tie-break rule:

Women's Grand Slams

Tie-breaks Per Match

Tie-breaks Per Set

Australian Open

0.23

0.10

French Open

0.21

0.09

Wimbledon

0.25

0.11

US Open

0.24

0.10

So, as we can see from the figures above, we should expect servers to be relatively dominant at the upcoming Australian Open, compared to all other Grand Slams with the exception of Wimbledon. This will give a slight propensity towards more tie-breaks, and by definition, slightly tighter sets with fewer break points and would imply higher game totals.

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Will Heat & Air-Quality Force Retirements?

Interestingly, the two Grand Slams with generally the hottest temperatures played in had more retirements (particularly in the men’s event), and also the lowest count of straight-set wins in the first round, from 2017-2019.

Men's Grand Slams

1st Rnd Completed Matches

3-0 1st Rnd (Completed)

Australian Open

181

47.5

French Open

189

49.7

Wimbledon

183

50.8

US Open

177

43.5

Women's Grand Slams

1st Rnd Completed Matches

2-0 1st Rnd (Completed)

Australian Open

188

70.2

French Open

190

71.1

Wimbledon

189

73.5

US Open

190

63.7

With the added problems of air-quality from the bush-fires retirements could have a much bigger part to play than previously.

While temperatures are forecast to be a little lower next week in Melbourne compared to previous years, it’s also worth mentioning the effects that the bushfires in Australia have had on players in qualifying. Several have had breathing difficulties, with Dalila Jakupovic forced to retire from her qualifier with Stefanie Voegele with the scoreline relatively level. Should the poor air quality continue in the coming weeks, it wouldn’t be a surprise if there were a plethora of retirements, particularly in the longer best of five set matches in the men’s tournament.

Favourites Struggle In Women's Event

Finally, on a different note, it is interesting to note that the US Open had a wider variety of finalists from 2010-2019 compared to the other tournaments, as well as a slightly lower favourite win percentage in quarter-finals in general

Men's Grand Slams

Winning Players 2010+

Finalist 2010+

Fav Win% QF Onward

Australian Open

3

6

77.8

French Open

3

8

90

Wimbledon

4

8

75

US Open

5

10

70

Women's Grand Slams

Winning Players 2010+

Finalist 2010+

Fav Win% QF Onward

Australian Open

7

13

52.4

French Open

8

13

61.9

Wimbledon

6

11

66.7

US Open

8

14

61.9

It’s probably not a huge surprise to see that there have been fewer winning players and finalists in the men’s tournaments, compared to the women’s events. Men’s Grand Slam events have typically been dominated by Novak Djokovic, Roger Federer and Rafa Nadal, while women’s events have generally been more open and competitive tournaments. This phenomenon also influences the win percentage in matches from the quarter-finals onwards.

Favourites have had a much higher win percentage at the business end of men’s Grand Slam tournaments, but again this is logical - the sheer dominance of the elite trio have ensured that a lot of the favourites in men’s Grand Slams started their matches as very strong favourites. However, across the last three years, it’s worth pointing out that favourites haven’t performed particularly well in the latter stages of the women’s Australian Open, so it will be interesting to see whether this trend continues in the upcoming event.